USN:
The Tacoma class were 96 frigates designed and built for the United States Navy in World War II, also used by the British (Colony class) and Soviet Navy under lend-lease, the storozhevoi korabl ("escort ships"). They also saw action in and the Korean War and were largely exported. Based on the British River class Frigate design to be built in civilian yards, they resluted in the Maritime Commission (MARCOM) S2-S2-AQ1 design approved for mass production in 1942, and classed at first as gunboats (PG) and then patrol frigates (PF) from 15 April 1943. All Tacoma-class in US service during World War II were manned by US Coast Guard crews in addition to teheir civilian construction, and they were transferred to the Coast Guard postwar, as well as exported to 13 countries, in service for several decades in the Cold War. Held in relative obscurity compared to escort destroyer design, they are an interesting WW2 frigate design, completely different from the purpose-designed ASW frigates built in the 1950s. But in the short allied frigate tree of WW2 they could be linked to the 1941 River class, and their own branches, the Loch and Bay class
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